Cu-doped 伪-Fe₂O₃ hierarchical microcubes: Synthesis and gas sensing properties

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• 作者：Peng Sun ; Chen Wang ; Xin Zhou ; Pengfei Cheng ; Kengo Shimanoe ; Geyu Lu ; Noboru Yamazoe
• 关键词：Cu-doped 伪-Fe2O3 ; Hydrothermal method ; Cubes ; Gas sensor
• 刊名：Sensors and Actuators B: Chemical
• 出版年：31 March, 2014
• 年：2014
• 卷：193
• 期：Complete
• 页码：616-622
• 全文大小：2010 K

文摘

Monodisperse and uniform pure and Cu-doped 伪-Fe₂O₃ cubes with a hierarchical architecture piled up nanoparticles as secondary units were obtained via a low-cost and environmentally friendly hydrothermal route. The structure and morphology of the as-synthesized products were characterized by X-ray diffraction (XRD), field-emission electron microscopy (FESEM), and transmission electron microscopy (TEM). The XRD results indicated that the lattice constants of doped samples were slightly smaller than that of the pure sample due to Cu incorporation. A comparative gas sensing study between the Cu-doped 伪-Fe₂O₃ and pure 伪-Fe₂O₃ cubes was performed to demonstrate the superior gas sensing properties of the doped samples. It was found that the sensor based on Cu-doped 伪-Fe₂O₃ (3.0 wt%) had a response of 19-100 ppm C₂H₅OH, which was about three times higher than that of the pure 伪-Fe₂O₃ nanostructures at the same operating temperature (225 掳C).